Back mold wiper



Ma 9, 1939. w H IBLEY 2,157,356

BACK MOLD WIPER I Filed Jan. 29, 1938 I diTT 012N52 Patented May 9, 1939 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to improvements in back mold wipers for Linotype machines and the main object is to provide a simple, highly efficient and inexpensive wiper device capable of continu- 5 ous use for longer periods of time than hitherto possible and providing for more eflicient Linotype operation particularly as pertains to mold disk operation of such machines.

Further objects and advantages are hereinafter fully set forth reference being had to the accompanying drawing, in which Fig. 1 is a top view of my improved mold wiper in operative position, the head or mold contact and adjacent parts being shown in horizontal,

central section to reveal certain details of construction.

Fig. 2 is a face view of the contact end of the wiper head.

Fig. 3 is a rear elevation of my device, in reduced scale, in operative position bearing against the rear face of a mold disk, a usual back knife being shown additionally and in its relative position to the wiper.

Referring to the drawing by reference numerals like characters designating corresponding parts in the various views, 5 designates the rotary mold disk of a Linotype machine and BT is the usual ring of teeth thereon.

As is well known in Linotype operation, a

type slug is cast vertically over the center of the mold disk, then the latter is rotated threequarters of a complete circle, in direction indicated by arrow 6 in Fig. 3. designates the exposed rear edges or bottom of the slugs (in three positions in Fig. 3).

8 designates the usual so-called back knife of a Linotype machine and having a cutting edge in a horizontal plane and contacting the rear face of the mold disk to cut and clear off all surplus slug metal. Said knife is adjustably mounted and removably retained in a fixed arm 9 of the Linotype machine. The cutting edge of the said knife is wide enough to clear all projecting metal of the slug passing the knife.

Below the back-knife is provided a mold disk wiper, such device designed to clear and polish the mold disk back surface to remove all stray particles, and foreign matter and properly maintain a smooth rear face and accurate gaging of 50 the slugs.

My wiper device comprises certain new and useful features of construction and use which will now be described.

[0 is a removable bracket of goose-neck type,

56 its lower end preferably enlarged and forked as at IUF in horizontal plane for removably engaging an upright stud H (with a nut I IN) of a fixed part I2 of the Linotype machine in proximity to the rear face of the mold disk.

The upper end of the goose-neck part comprises an integral horizontal bearing lilB directed toward the mold disc, the rear end of said hearing closed and the front end openfor insertion of a slidable retention of a shank part I2S of a head piece l2.

l3 designates the bore of the bearing lllB. Within said bore the shank I2S is reduced in diameter to form a stem I2S which extends rearwardly through a bore I3A in the closed end of the bearing and protrudes therefrom. The rear end part of said stem IZS is threaded exteriorly and on the exposed threads is engaged the hub part Hill of a compression grease cup l4.

I5 is a helical coil spring about the stem I2S' within the bearing H113 and in constant compression between the closed end of the bearing and the shoulder It at inner or rear end of the shank IZS. Thus the head l2, carrying certain friction contact means engaging the disk mold, is continuously impelled forwardly and said forward pressure is limited only by the front end of hub MH contacting the bearing, or other limiting means may be used.

The head I2 is of shallow cup-like form openv forwardly and within its bore is concentrically and removably retained a rearwardly flanged washer 24 normally engaging the bottom of the bore with its flanges and thus providing a space I! comprising a lubricant reservoir. I8 are a pair of minute outlets in the washer and located in predetermined spaced relation on a diametrical line and equidistant from center.

I9 is a one piece circular pad of felt or equivalent material and of an outside diameter to be snugly fitted into the open end of the head l2 and may be retained in said bore by pointed screws 20 or equivalent thereof. The thickness of this pad is preferably to 1" and it bears inwardly against the face of the washer 24, the latter being positioned so that about one-half the thickness of the washer is pocketed and retained within the rim of the head l2.

The outer or exposed face of the pad bears against the rear face of the mold disk and is pressed continuously against said face by the spring l5.

In the central part of the pad I9 is provided a narrow slot ISS (diametrically) of a length greater than the distance between outlets I8, the pad being positioned with said slot in alinement with said outlets so that lubricant is introduced or forced directly into the slot. Obviously the forward part of the slot will be nearly or entirely closed by the pressing contact of the pad with the back mold. This however causes the lubricant to enter and saturate the pad and its contact surface as desired by simply manipulating the head 14 of the grease cup to inject or project lubricant through the bore 2| of the stem I2Sl2S'. Initial manipulation of M circulates lubricant into reservoir I! and further manipulation continues circulation of the lubricant through apertures I 8 and into the pad.

The lubricant used is optional but consists preferably of a mixture of graphite and oil.

The size of the pad is not specific but in any case should be of a diameter as great or more than the length of the back-knife and the wiper is so positioned that it clears, wipes and polishes the area first cleared by the back-knife, as between the two circular dotted lines 22 in Fig. 3.

In the use of this device, the one-piece contact pad described is of exceptional durability. As described desired moist lubricating area is easily maintained by simple adjustment of head I4.

The washer 24 serves as a spacer to contact the inner face of the pad and hold the latter in properly exposed position.

Variations in details of structure and proportions thereof may be embodied without departing from the scope and spirit of the invention as herein described and hereinafter claimed.

I claim:

A back mold wiper comprising a bracket removably securable rigidly to a fixed element adjacent to the back face of a mold disk, a horizontally disposed tubular bearing comprising an integral part of said bracket, a mold wiper member reciprocally and slidably mounted in said bearing, said Wiper member comprising an enlarged head of cup like form forward of said bearing and opening toward the mold disk, a one-piece mold disc contacting pad retained in the open end of said head and protruding therefrom, spring means pressing said head and pad forwardly, a source of lubricant and means of conducting same under pressure into and through said head, and into the wiper pad, and a flanged spacing washer within the bore of said head to hold the wiper pad in predetermined exposed position and simultaneously provide a lubricant reservoir, a number of apertures arranged in alinement in said washer, said wiper pad provided with transverse passage means registering with said aperture for the purpose set forth.

WILLIAM H. SIBLEY. 

